Measure, Cut, Ruffle, Sew! DIY Running Skirt :)
Cookie Monster running costume for the chocolate 10k.
Patriotic Running Costume for the Patriot's Challenge at the Run for the Dream Half Marathon in Williamsburg, VA
Custom color EL-wire glowing tutu. These would be so fun in a night race!
RunDisney Costumes by mamaspartydress on Polyvore featuring NIKE, Asics, Disney, New Balance, Saucony, Puma, Vibram FiveFingers, 2XU, Yazbukey and adidas
"Vader Running Costume" Would only be able to wear the mask for photos
Tips for Making a Running Costume | runDisney
Holiday Running Costumes | Sparkle Athletic
A Running Tutu - a how-to post with lots of pictures